diff --git a/Dockerfile b/Dockerfile
index 6f211de..ec7e19c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,6 +17,7 @@ ENV RESTIC_TAG=""
 ENV NFS_TARGET=""
 # By default backup every 6 hours
 ENV BACKUP_CRON="* */6 * * *"
+ENV RESTIC_FORGET_ARGS=""
 
 # /data is the dir where you have to put the data to be backed up
 VOLUME /data
diff --git a/backup.sh b/backup.sh
index 3e0954d..3efa25b 100644
--- a/backup.sh
+++ b/backup.sh
@@ -4,4 +4,7 @@ echo "Starting Backup"
 
 restic backup /data --tag=${RESTIC_TAG?"Missing environment variable RESTIC_TAG"} >> /var/log/cron.log
 
-
+if [ -n "${RESTIC_FORGET_ARGS}" ]; then
+    echo "Forget about old snapshots based on RESTIC_FORGET_ARGS = ${RESTIC_FORGET_ARGS}"
+    restic forget ${RESTIC_FORGET_ARGS}
+fi